[Webkit-unassigned] [Bug 156086] New: CSP: Define explicitly datatype for nonce

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=156086

            Bug ID: 156086
           Summary: CSP: Define explicitly datatype for nonce
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Local Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dbates at webkit.org

Currently in the Content Security Policy code we represent nonces as String objects and have overloaded functions that take either a URL or a nonce. Notice that a URL object can be implicitly converted to a String object because the URL class defines a String conversion operator. This makes passing a nonce to an overloaded functions with default arguments that accepts either a URL or String in the same argument position error prone because the compiler may chose to implicitly convert a URL to a String and call the overloaded function for a nonce. One example of fragile function because of the implicit conversion of URL to String is the static non-member function checkFrameAncestors() (defined in file ContentSecurityPolicyDirectiveList.cpp): <http://trac.webkit.org/browser/trunk/Source/WebCore/page/csp/ContentSecurityPolicyDirectiveList.cpp?rev=198920#L79>. Care must be taken to update this call site should ContentSecurityPolicySourceListDirective ::allow(const URL&), <http://trac.web

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